¹ØÓÚMSSQLĬÈÏÖµµÄÎÊÌâ
ÎÒÔÚMSSQL¹ÜÀíÆ÷Àï°Ñн¨×Ö¶Îstr
ÔÚĬÈÏÖµ»ò°ó¶¨ÄÇÀïÎÒÌîдÁË0
È»ºóÎÒ·¢ÏÖ¡£Èç¹ûÎÒÔÚÔö¼Ó¼Ç¼ʱ¡£Õâ¸öSTR²¢²»ÊÇĬÈϵÄ0¶øÊÇNULLÔõô»ØÊ£¿£¨ÔÚÔö¼Ó×Ö¶Îʱ¡£ÎÒûÓмÈërs("str")µÄÖµ¡£Ô±¾ÒÔΪÕâÑù»áÏëMDBÄÇÑù£¬ËüÖ±½Ó˵0.ËÖªµÀ»¹ÊÇNULL¡£º¹£©
±¾È˸ջ»MSSQL¡£ÇëÁ½â
ÔÚĬÈÏÖµÄÇÀïÉèÖÃÓ¦¸ÃûÎÊÌâµÄ
ÔÚ²åÈëÊý¾ÝµÄÊÇÖ¸¶¨ÆäËûµÄÁкÍÖµ¼´¿É
Èç tb(id int,str varchar(10))
insert tb(id) values(10)
½á¹ûΪ
10 0
ÎÒÓõÄÊÇRS.ADDNEWS¸üеÄÊý¾Ý¡£»á²»»áÓÐÓ°Ïì
Õâ¸ö²»ÊǺÜÇå³þ£¬Äã¿ÉÒÔÔÚ²éѯ·ÖÎöÆ÷ÓÃsqlÓï¾ä²åÈëÊý¾Ý²âÊÔÒ»ÏÂ
Õý³£Çé¿ö²»»á¡£¡£
¡£¡£¡£¡£¡£¡£¡£¡£
²»»á
¿ÉÒÔÊÔ×ŰÑÉèÖÃĬÈÏÖµµÄ×Ö¶ÎÉèÖÃΪnot null£¬ÔÙ²âÊÔ¿´¿´ÄÄÀï³öµÄÎÊÌâ
Ïà¹ØÎÊ´ð£º
ÓÐÒ»¸öÊý¾Ý¿âÀïÖ»ÓÐ2WÌõÊý¾Ý²»µ½£¬È´ÓÐ500MÄÇô´ó,Ôõô»ØÊ°¡£¿ÊÇACCESSµÄÊý¾Ý¿â¡£ºóÀ´ÎÒ°ÑACCESSµ¼Èëµ½MSSQLÖУ¬Ò²Õ¼ÓÃÁË500M×óÓҵĿռ䣬Èç¹ûѹËõÊý¾Ý¿âÄØ£¿Çë¸ßÊÖÖ¸µã
ѹËõÊý¾Ý¿â£¿ÄÜ×öµ½Ã´...
ÆÚ´ý¸ßÈËÖ¸µã ÎÒ ......
±íµÄ½á¹¹ÈçÏ£º
±í1£ºtb_big
×ֶΣºfalseid Öµ£º1£¬2£¬
×ֶΣºbigtype Öµ£ºA£¬B£¨ÓëfalseidµÄÖµµÄλÖÃÒ»Ò»¶ÔÓ¦£¬¼´1¶ÔÓ¦A£¬2¶ÔÓ¦B£©
±í2£ºtb_small
×ֶΣºfalseid£¨Óëtb_bigµÄfalseid_1¹ØÁªµ ......
±íµÄ½á¹¹ÈçÏ£º
±í1£ºtb_big
×ֶΣºfalseIDÖµ£º1£¬2
×ֶΣºbigtype Öµ£ºA£¬B£¨ÓëfalseIDµÄÖµµÄλÖÃÒ»Ò»¶ÔÓ¦£¬¼´1¶ÔÓ¦A£¬2¶ÔÓ¦B£©
±í2£ºtb_small
×ֶΣºfalseID£¨Óëtb_bigµÄfalseID¹ØÁªµÄ ......
ÈçÌ⣬MYSQLÓÖÔõô»ñÈ¡£¿
ÈçÌâ
Õâ¸ö¹À¼ÆÔÚÈÕÖ¾ÎļþÖвÅÄÜ¿´¼û°É
Õâ¸ö¹À¼ÆÔÚÈÕÖ¾ÎļþÖвÅÄÜ¿´¼û°É
ÒýÓÃ
³ý·ÇÄãÒµÎñÉÏ×ö¼Ç¼£¬·ñÔòÄãÊDz»ÄÜÖªµÀµÄ¡£ÒòΪÈÕÖ¾²»¼Ç¼selectÓï¾äÃüÁî¡£
..
ÄÇÓÐûÓÐϵͳ´ ......
ÎÒÓÃ("insert into LM_info ([content],[date],[username]) values ('"&content&"',date(),'"&username&"')")
ÊÇ´íÎóµÄ¡£
µ«ÊÇÎÒÓÃgetdat ......